I posted on the other site and I guess no one is online there so maybe you guys can help. I did the clear tube deal and set the floats and did the float mod. Went to the dunes today and in first and second playing around doing wheelies it runs great but when I go ***** out to climb a dune it cuts out really bad. So after a long hr ride I came home bummed. Any ideas? I have not checked the levels yet, not sure I want to.

 

Was it running right before you messed with the floats? If so, check yours again. They are tough to set perfectly, sometimes it takes a few times. Were you popping wheelies or riding wheelies? Any bog on the low end?

 

I had a guru adjust my valves,set the floats,and rejet and it ran great until I rolled down a dune and then the carbs started runnning gas out while sitting and it ran like crap. After a week I took it out at home and it ran good but still ran gas out the overflow when sitting.

After my attempt at setting the floats using the clear tube method I went to the dunes and when I first barely hit the throttle it cut out for just a fraction of a second then took off in first and second, doing small wheelies but then when I hit third to go up a big dune it cuts out real bad before I get close to being reved out enough to shift into fourth.

 

Sounds like your floats are set too high to me. I have an 01 Raptor, and have the floats set right at the mating surface where the bowl meets the carb body. Runs perfect. These things are real sensitive to the level of the float.

 

Wouldn't running out of gas and cutting out mean float level too low? I am new at this so bare with me. I need to recheck using the tube but I don't trust me too much!

 

If it's bogging off the bottom, the idle circuit is flooding. That can cause all kinds of problems depending on the angle. Because you are bogging just a little at takeoff (level ground I assume) and then the top end isn't right when the front of the quad is raised on the hill, it sounds like your floats are still a bit too high. If the fluid level is above the mating surface when you check with the clear tube again, you are going to have problems somewhere. Most folks find the sweet spot between the mating surface and 2mm below the mating surface. Stick with it and you will become a guru too!:-)

 

I took the bike to a Raptor guru and he said the floats are right on and has not been able to find out why it runs crappy. I told him about the float mod filing off the tab and he just rolled his eyes. I had a panty hose over the end of the air box where the snorkle hooked on and he took that off and said that was the problem as it changes the vacuum and it seemed to stop the bad cutting out but it stll runs like crap and doesn't have the power that it did. Any ideas out there?

 

mine doed that when i get onto hills or any non falt surface. exactly how does it flood. i dont understand...because the flots would actually be up high since the carb is angled isnt it? explain if im wrong. i was wondering if it getting to much or too little fuel...altough usually too littel fuel will amke it idle high and it doesnt do that. just sputters,... then when im on the flat it runs good. how do you do that again? with the clear tube and the gas? what areyou calling the mating surface? the top of the bowl that comes off or what?...

 

The mating surface is the line between the carb body and the float bowl. If you take the 4 screws out of the bottom of the bowl, it separates from the carb body at the mating surface.

When your quad is flat, the level of gas in the carb bowl is just below the air vent for the idle circuit (pilot jet). When you angle the front end up with the floats set too high, the fuel gets too high in rear of the bowl, plugs the air vent, and floods the idle circuit. If the floats are high enough, gas will run out of the overflow tube. When the idle circuit floods, the engine bogs.

Remove the overflow tube and replace it with a clear tube. Loosen the bowl drain screw and hold the free end of the clear tube up beside the carb body. The fuel level in the clear tube will match the fuel level in the bowl. If the fuel level in the bowl is above the mating surface, the floats are set too high.

 

oh my i just went to lowes and bought the clear tubing. i did the test. its 3/16 of an inch ABOVE where the bowl meets the carb body. are you guys sure its supposed to be 2mm below the bowl meeting place. if so then mine are a half inch too high.... wow. do you think that would be the cause of my problems?? its just weird that they are BOTH set exactly the same.. about 3 or 4 mm above the bowl/ carb body junction.